I took advantage of the free Portal download through Steam a few weeks ago, and noticed some problems. First off, the writing on the walls(and the readout on the radios) is blurry and unreadable. I know this isn't normal for the console versions, but is it normal for the PC version? The second problem is probably easier to solve. The game gets choppy a lot. Audio, visual, controls, everything. I've never played such a large game on this computer since we bought it in 2008(Windows Vista), so chances are something is out of date or insuffecient. I updated the drivers this morning for the NVIDIA GeForce 6150SE nForce 430 graphics card, but that didn't help. I've got 3 GB of RAM, so that may not be the problem. Nothing is running in the background that uses more than 2-9% of the CPU at a time. I also defragmented the hard drive last night. So...help?